(A) : When external force acting on a body moving on a rough horizontal surface is doubled, the acceleration of the body is doubled.
(R ) : The acceleration of a body moving on a rough horizontal surface is proportional to the resultant force acting on it.

Options

A. Both (A) and (R ) are true and (R ) is the correct explanation of (A)
B. Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
C. (A) is true but (R ) is false
D. (A) is false but (R ) is true

Answer

D